amplificatore pioneer sa 500a specifications power output: 13 watts per channel into 8Ω (stereo) frequency response: 30hz to 50khz total harmonic distortion: 0.5% damping factor: 40 input sensitivity: 2.5mv (mm), 200mv (line) signal to noise ratio: 75db (mm), 90db (line) channel separation: 50db (mm), 55db (line) output: 200mv (line) speaker load impedance: 4Ω to 16Ω semiconductors: 18 x transistors, 6 x diodes dimensions: 330 x 118 x 316mm weight: 5.5kg